asyncrat | e54c38c8d43f2a11ac1c997438d4586a3270f1545f8ef02b8992ebc35005823c

Analysis

max time kernel
140s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2023, 17:07

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General

Target

17f89183d951f5ea258d8d242368a3d8.exe
Size

612KB
MD5

17f89183d951f5ea258d8d242368a3d8
SHA1

41d7143f06a9fe53b6d8fda2b6d7c629c7a7a133
SHA256

e54c38c8d43f2a11ac1c997438d4586a3270f1545f8ef02b8992ebc35005823c
SHA512

65e59efd1e77def251c8def6065b7eb1c8944c0ec3c29f0b59eac3c7aa3dd1ced8b4ac5993804736a6b724528ce36fbd6aaf6c05c86e594eb7a61de644f0d71d
SSDEEP

12288:NcrNS33L10QdrXjZDnDLRH6/cOOScBEcmJE28syNM34odu+K:wNA3R5drX1DDLRHMncBeFySIodrK

Score

10^/10

asyncrat default8 rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default8

185.225.73.105:8675

185.225.73.105:7896

mloptuytonroyem.sytes.net:8675

mloptuytonroyem.sytes.net:7896

Mutex

AsyncMutex_7SI8ObPWc

Attributes

delay
3
install
true
install_file
cesr.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/1740-31-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	17f89183d951f5ea258d8d242368a3d8.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	jzfjgshg.sfx.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	jzfjgshg.exe

Executes dropped EXE 5 IoCs

pid	Process
1452	jzfjgshg.sfx.exe
1076	jzfjgshg.exe
1740	jzfjgshg.exe
2580	cesr.exe
4980	cesr.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1076 set thread context of 1740	1076	jzfjgshg.exe	94
PID 2580 set thread context of 4980	2580	cesr.exe	107

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3640	4980	WerFault.exe	107

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1824	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3416	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe
1740	jzfjgshg.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1076	jzfjgshg.exe
Token: SeDebugPrivilege	1740	jzfjgshg.exe
Token: SeDebugPrivilege	2580	cesr.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 3692	4692	17f89183d951f5ea258d8d242368a3d8.exe	85
PID 4692 wrote to memory of 3692	4692	17f89183d951f5ea258d8d242368a3d8.exe	85
PID 4692 wrote to memory of 3692	4692	17f89183d951f5ea258d8d242368a3d8.exe	85
PID 3692 wrote to memory of 1452	3692	cmd.exe	88
PID 3692 wrote to memory of 1452	3692	cmd.exe	88
PID 3692 wrote to memory of 1452	3692	cmd.exe	88
PID 1452 wrote to memory of 1076	1452	jzfjgshg.sfx.exe	89
PID 1452 wrote to memory of 1076	1452	jzfjgshg.sfx.exe	89
PID 1452 wrote to memory of 1076	1452	jzfjgshg.sfx.exe	89
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1076 wrote to memory of 1740	1076	jzfjgshg.exe	94
PID 1740 wrote to memory of 4688	1740	jzfjgshg.exe	98
PID 1740 wrote to memory of 4688	1740	jzfjgshg.exe	98
PID 1740 wrote to memory of 4688	1740	jzfjgshg.exe	98
PID 1740 wrote to memory of 1568	1740	jzfjgshg.exe	99
PID 1740 wrote to memory of 1568	1740	jzfjgshg.exe	99
PID 1740 wrote to memory of 1568	1740	jzfjgshg.exe	99
PID 4688 wrote to memory of 1824	4688	cmd.exe	103
PID 4688 wrote to memory of 1824	4688	cmd.exe	103
PID 4688 wrote to memory of 1824	4688	cmd.exe	103
PID 1568 wrote to memory of 3416	1568	cmd.exe	102
PID 1568 wrote to memory of 3416	1568	cmd.exe	102
PID 1568 wrote to memory of 3416	1568	cmd.exe	102
PID 1568 wrote to memory of 2580	1568	cmd.exe	106
PID 1568 wrote to memory of 2580	1568	cmd.exe	106
PID 1568 wrote to memory of 2580	1568	cmd.exe	106
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107
PID 2580 wrote to memory of 4980	2580	cesr.exe	107

C:\Users\Admin\AppData\Local\Temp\17f89183d951f5ea258d8d242368a3d8.exe
"C:\Users\Admin\AppData\Local\Temp\17f89183d951f5ea258d8d242368a3d8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4692
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\agwkien.cmd" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3692
- - C:\Users\Admin\AppData\Local\Temp\jzfjgshg.sfx.exe
    jzfjgshg.sfx.exe -pwejtnhlopfigsohdfuishgrygfysrsoihfihgsoifghsithngmkaswodtyuiofxvflfadfdyehngfszafugyRhhguhrsugsudbfrgsfskfshbrkgysgrhgnmePvqxsHb -dC:\Users\Admin\AppData\Local\Temp
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1452
  - - C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe
      "C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1076
    - - C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe
        
        C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe
        5⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1740
      - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "cesr" /tr '"C:\Users\Admin\AppData\Roaming\cesr.exe"' & exit
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:4688
        
        C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "cesr" /tr '"C:\Users\Admin\AppData\Roaming\cesr.exe"'
        7⤵
        Creates scheduled task(s)
        
        PID:1824
      - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA2C8.tmp.bat""
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:1568
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        7⤵
        Delays execution with timeout.exe
        
        PID:3416
        
        C:\Users\Admin\AppData\Roaming\cesr.exe
        
        "C:\Users\Admin\AppData\Roaming\cesr.exe"
        7⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2580
        
        C:\Users\Admin\AppData\Roaming\cesr.exe
        
        C:\Users\Admin\AppData\Roaming\cesr.exe
        8⤵
        Executes dropped EXE
        
        PID:4980
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4980 -s 72
        9⤵
        Program crash
        
        PID:3640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4980 -ip 4980
1⤵
PID:1364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\jzfjgshg.exe.log

Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Local\Temp\agwkien.cmd

Filesize
19KB

MD5
1b691bb471660c064a30e159bc156d25

SHA1
31e5129cf89dd20eedf400e13e41785f8ab049de

SHA256
dd841bc52a05aba3635172cc4af2687f9e5c896fc22ea10185bb370ffd43e16f

SHA512
b63a20ec64c046289ea60c9c4ba394d6739371bed8b58a798fa15d9ab2dda145da231d8186e366c05422e5633fde9b46edf78af8f8ef81ea12a7b3b3b1d818b6

Download Submit
C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
C:\Users\Admin\AppData\Local\Temp\jzfjgshg.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
C:\Users\Admin\AppData\Local\Temp\jzfjgshg.sfx.exe

Filesize
459KB

MD5
7eb26e1af91272a1f854376abb42070c

SHA1
5f31cec81e54ecf59953fde86ad8f09823a8431f

SHA256
72c92e967547988bf22adc7f66304780efc3f70627dfd4e54024dd2f9f68c634

SHA512
264998421b7baa475836f03ee5ed0c6005528a404d172125ee680a784a09c4673385fc5e374dc6a5d99106a235db36e201da8138c47cfcd1e6cbcd3d64b45cee

Download Submit
C:\Users\Admin\AppData\Local\Temp\jzfjgshg.sfx.exe

Filesize
459KB

MD5
7eb26e1af91272a1f854376abb42070c

SHA1
5f31cec81e54ecf59953fde86ad8f09823a8431f

SHA256
72c92e967547988bf22adc7f66304780efc3f70627dfd4e54024dd2f9f68c634

SHA512
264998421b7baa475836f03ee5ed0c6005528a404d172125ee680a784a09c4673385fc5e374dc6a5d99106a235db36e201da8138c47cfcd1e6cbcd3d64b45cee

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA2C8.tmp.bat

Filesize
148B

MD5
c0456ef4db137e6689b6e8d17d391258

SHA1
5066e28f18f22b6cd7abc9330eedd36d681df5a9

SHA256
89c3e5dc30af401f5f328c11735c7161ae71997d57ca31e9dc3163d84f216229

SHA512
ffed748fdb6d4f901a03e3b791769addf43a7affa558928cfa994116b93f190976e08e8ea780b369557f40b4596c36c41c536948dd474f7a14a4703c75392570

Download Submit
C:\Users\Admin\AppData\Roaming\cesr.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
C:\Users\Admin\AppData\Roaming\cesr.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
C:\Users\Admin\AppData\Roaming\cesr.exe

Filesize
234KB

MD5
25ff024ae3b00e8dc5d53d82681d25e5

SHA1
d09df86d87cc2a7e022358eb388feb4f33234ebc

SHA256
20d829712638e1cf6dac27bdcc57f247a24a7de8fba941568dd41e869d84f75c

SHA512
32f5e4ccdaaa1c56c85419576b0e8ed247b9fdd12e2a3c6e76f2e4f46218dfe46fcff790b87d75d49b901442336b9b6ace767ddc148e8c10923292504d40ee75

Download Submit
memory/1076-30-0x0000000005620000-0x0000000005626000-memory.dmp

Filesize
24KB

Download
memory/1076-23-0x0000000000960000-0x00000000009A0000-memory.dmp

Filesize
256KB

Download
memory/1076-28-0x0000000005C90000-0x0000000006234000-memory.dmp

Filesize
5.6MB

Download
memory/1076-27-0x0000000005640000-0x00000000056DC000-memory.dmp

Filesize
624KB

Download
memory/1076-22-0x0000000074AF0000-0x00000000752A0000-memory.dmp

Filesize
7.7MB

Download
memory/1076-26-0x00000000052E0000-0x000000000531E000-memory.dmp

Filesize
248KB

Download
memory/1076-35-0x0000000074AF0000-0x00000000752A0000-memory.dmp

Filesize
7.7MB

Download
memory/1076-29-0x00000000056E0000-0x0000000005772000-memory.dmp

Filesize
584KB

Download
memory/1076-24-0x00000000052D0000-0x00000000052D6000-memory.dmp

Filesize
24KB

Download
memory/1076-25-0x0000000005270000-0x0000000005280000-memory.dmp

Filesize
64KB

Download
memory/1740-42-0x0000000074AF0000-0x00000000752A0000-memory.dmp

Filesize
7.7MB

Download
memory/1740-38-0x0000000004E00000-0x0000000004E66000-memory.dmp

Filesize
408KB

Download
memory/1740-37-0x0000000004C60000-0x0000000004C70000-memory.dmp

Filesize
64KB

Download
memory/1740-36-0x0000000074AF0000-0x00000000752A0000-memory.dmp

Filesize
7.7MB

Download
memory/1740-31-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2580-47-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download
memory/2580-48-0x0000000002AD0000-0x0000000002AE0000-memory.dmp

Filesize
64KB

Download
memory/2580-52-0x00000000751B0000-0x0000000075960000-memory.dmp

Filesize
7.7MB

Download